On Thu, Apr 05, 2012 at 04:48:45PM +0900, Akihiko Sato wrote:
# postconf -n: mydestination = qbu.example.com, qbu, localhost.localdomain, localhost
http://www.postfix.org/VIRTUAL_README.html
[...] NEVER list a virtual MAILBOX domain name as a mydestination domain!
/var/log/mail.log: Apr 5 16:38:36 qbu postfix/pickup[25470]: BDC3221212: uid=0 from=<root> Apr 5 16:38:36 qbu postfix/cleanup[25500]: BDC3221212: message-id=20120405073836.BDC3221212@qbu Apr 5 16:38:36 qbu postfix/qmgr[25471]: BDC3221212: from=root@qbu.example.com, size=230, nrcpt=1 (queue active) Apr 5 16:38:36 qbu postfix/pipe[25502]: BDC3221212: to=a@example.com, relay=dovecot, delay=0.04, delays=0.02/0/0/0.02, dsn=4.3.0, status=deferred (temporary failure)
Also with 2.x you may want to use LMTP rather than the LDA Piping.
http://wiki2.dovecot.org/HowTo/PostfixDovecotLMTP
Regards Thomas